Double column storage tower



FIG. 1 is a perspective view of a double column storage tower of the present invention;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof; the left side elevational view being a mirror image thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is an enlarged perspective view of the base illustrated in isolation;

FIG. 8 is a top plan view thereof;

FIG. 9 is a front elevational view thereof;

FIG. 10 is a right side elevational view thereof; the left side elevational view being a mirror image thereof;

FIG. 11 is a bottom plan view thereof; and,

FIG. 12 is a rear elevational view thereof.

The dotted line showings in the drawings of stored cases and ground lines are for environmental purposes only and form no part of the claimed design. Also, the article is illustrated in an orientation as if supported on a surface sloping slightly forwardly; this surface is shown at the base of FIG. 3; if it had been illustrated supported on a flat horizontal surface, it would be sloping backwards slightly; thus, the article is illustrated in a vertical upright orientation for the sake of clarity.

The base has been shown separately in FIGS. 7-12 for convenience of illustration. 

The ornamental design for a double column storage tower, as shown and described. 